Pile foundation low strain detection device

Abstract

A pile foundation low-strain detection device comprises a sensor probe, a sensor body and a hammer head, the sensor probe is connected with the sensor body through a circuit, and a hammer handle is fixedly installed on one side of the hammer head, and the pile foundation low-strain detection device is characterized in that a vertical pipe with an opening in the bottom is arranged on the periphery of the hammer head, and a first annular plate is fixedly installed at the bottom of the vertical pipe; the hammer head can penetrate through the first annular plate to make contact with the pile foundation, a sliding groove is formed in the top of the vertical pipe, the hammer handle is slidably installed in the sliding groove, a transverse plate is fixedly installed at the top of the hammer handle, and scales are arranged on the hammer handle. The pile foundation detection hammer is simple in structure, ingenious in conception, capable of guaranteeing the same beating strength and avoiding the influence of different beating strength on working quality when a pile foundation is detected, meanwhile capable of selecting the beating strength according to the scales on the hammer handle, easy to operate, capable of meeting actual requirements and suitable for popularization.

Description

Technical Field

[0001] The utility model belongs to the field of pile foundation detection, in particular to a pile foundation low strain detection device. Background Art

[0002] Construction pipe piles are the foundation of building structures, which directly affect the stability of buildings. In order to ensure that the building maintains good stability during subsequent use, after the construction of construction pipe piles is completed, the pipe piles must be tested for strain force; the detection of pipe piles includes low strain detection and high strain detection; among them, low strain detection requires the detection device to knock on the top of the pipe pile, apply an excitation signal to generate a stress wave, and when the stress wave propagates downward along the pile body and encounters a discontinuous interface (such as honeycomb, mud inclusion, fracture, hole and other defects) and the bottom of the pile, an emission wave will be generated. By detecting and analyzing the propagation time, amplitude and waveform characteristics of the emission wave, the integrity of the pile can be judged; currently, the staff directly knocks on the pile foundation with a hammer, and the strength of each knock cannot be controlled, and the knocking points are different, resulting in different fluctuations, which is inconvenient to use and affects the work quality. Therefore, we have designed a detection device that is easy to control the knocking force. Utility Model Content

[0003] The utility model provides a pile foundation low strain detection device, which is used to solve the defects in the prior art.

[0004] The utility model is realized through the following technical solutions:

[0005] A low-strain detection device for a pile foundation comprises a sensor probe, a sensor body and a hammer head, wherein the sensor probe is connected to the sensor body through a circuit, a hammer handle is fixedly installed on one side of the hammer head, and the device is characterized in that a vertical tube with an opening at the bottom is provided on the outer periphery of the hammer head, a first annular plate is fixedly installed at the bottom of the vertical tube, the hammer head can pass through the first annular plate and contact the pile foundation, a slide groove is provided at the top of the vertical tube, the hammer handle is slidably installed in the slide groove, a horizontal plate is fixedly installed on the top of the hammer handle, and a scale is provided on the hammer handle.

[0006] In the pile foundation low strain detection device as described above, a hard rubber layer is fixedly provided on the bottom of the hammer head.

[0007] In the above-mentioned low-strain detection device for pile foundation, a plurality of support rods are provided at the bottom of the sensor probe, and the support rods can fit closely with the pile foundation.

[0008] As described above, a low-strain detection device for pile foundation, wherein a short tube is fixedly installed on the periphery of the sensor probe, the upper and lower sides of the short tube are open, the outer periphery of the short tube is provided with a thread, the outer periphery thread of the short tube is matched with a nut for installation, a second annular plate is rotatably installed on the nut, the second annular plate is slidably installed on the outer periphery of the short tube, one side of the support rod is hinged to one end of the connecting rod, the other end of the connecting rod is hinged to the second annular plate, and the support rods are rotatably connected to the outer periphery of the short tube through hinge shafts.

[0009] In the pile foundation low strain detection device as described above, a handle is fixedly installed on the outer periphery of the nut.

[0010] In a pile foundation low strain detection device as described above, a third annular plate is fixedly installed on the outer periphery of the short tube, a thread is provided on the inner periphery of the first annular plate, the outer periphery diameter of the third annular plate is the same as the inner periphery diameter of the first annular plate, and a cross bar is fixedly installed on the outer periphery of the short tube.

[0011] In the pile foundation low strain detection device as described above, the bottom end of the hammer handle is provided with a thread, and the slide groove is also provided with a thread.

[0012] The advantages of the utility model are: the utility model has a simple structure and an ingenious design. When testing the pile foundation, the same knocking force can be guaranteed to avoid the influence of different knocking forces on the work quality. At the same time, the size of the knocking force can be selected according to the scale on the hammer handle. At the same time, the knocking points are the same, the operation is simple, and the actual needs can be met, which is suitable for promotion. When using the utility model, the sensor probe is first pasted to one side of the top surface of the pile foundation, and the first annular plate is placed on the pile foundation. The first annular plate does not contact the sensor probe. At this time, the hammer handle is pulled upward through the cross plate, and pulled to the appropriate scale according to actual needs. The cross plate is loosened, and the hammer handle slides downward along the slide groove. Finally, the hammer handle drives the hammer head to move downward to knock the pile foundation. When multiple knocks are required, the hammer handle can be pulled to the same scale. After the knocking is completed, the pile foundation is judged to meet the requirements based on the information fed back to the sensor body by the sensor probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 It is a structural schematic diagram of the utility model; Figure 2 is a schematic diagram of the structure of the striking device; Figure 3 It is a schematic diagram of the external structure of the sensor probe.

[0015] Figure numerals: 1. sensor probe, 2. hammer head, 3. hammer handle, 4. vertical tube, 5. slide groove, 6. first annular plate, 7. horizontal plate, 8. scale, 9. sensor body, 20. hard rubber layer, 30. support rod, 40. short tube, 41. nut, 42. second annular plate, 43. connecting rod, 50. handle, 60. horizontal rod, 61. third annular plate. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] A low strain detection device for pile foundation, such as Figure 1 , 2 As shown in , 3, through circuit connection, a hammer handle 3 is fixedly installed on one side of the hammer head 2, characterized in that: a vertical tube 4 with a bottom opening is provided on the outer periphery of the hammer head 2, a first annular plate 6 is fixedly installed on the bottom of the vertical tube 4, the inner periphery of the first annular plate 6 is the same as the inner wall diameter of the vertical tube 4, the hammer head 2 can pass through the first annular plate 6 and contact the pile foundation, a slide groove 5 is provided on the top of the vertical tube 4, the hammer handle 3 is slidably installed in the slide groove 5, a horizontal plate 7 is fixedly installed on the top of the hammer handle 3, and a scale 8 is provided on the hammer handle 3. The utility model has a simple structure and an ingenious design. When testing the pile foundation, the same striking force can be guaranteed to avoid the influence of different striking forces on the work quality. At the same time, the size of the striking force can be selected according to the scale 8 on the hammer handle 3. The operation is simple, it can meet actual needs, and is suitable for promotion. When using the utility model, firstly, the sensor probe 1 is pasted to one side of the top surface of the pile foundation, and the first annular plate 6 is placed on the pile foundation. The first annular plate 6 is not in contact with the sensor probe 1. At this time, the hammer handle 3 is pulled upward through the cross plate 7. According to actual needs, it is pulled to a suitable scale 8, and the cross plate 7 is released. At this time, the hammer handle 3 slides downward along the slide groove 5, and finally the hammer handle 3 drives the hammer head 2 to move downward to knock the pile foundation. When multiple knocks are required, the hammer handle 3 can be pulled to the same scale, and the knocking point remains unchanged. After the knocking is completed, it is judged whether the pile foundation meets the requirements based on the information fed back to the sensor body 9 by the sensor probe 1.

[0018] Specifically, as shown in the figure, a hard rubber layer 20 is fixedly provided at the bottom of the hammer head 2 in this embodiment. The hard rubber layer 20 can play a role of buffering and shock absorption when the pile foundation is struck.

[0019] Specifically, as shown in the figure, the bottom of the sensor probe 1 of this embodiment is provided with several support rods 30. In this embodiment, there are four support rods 30, which are distributed in a circle and can fit with the pile foundation. When the sensor probe 1 is placed on the pile foundation, the support rods 30 can provide support for the sensor probe 1, so that it remains in a vertical state and fits closely with the pile foundation, to prevent the sensor probe 1 from being unable to remain perpendicular to the pile foundation when placed on the sensor probe 1 due to its small size.

[0020] Specifically, as shown in the figure, the sensor probe 1 of this embodiment is fixedly installed with a short tube 40 on its outer periphery, the upper and lower sides of the short tube 40 are both open, the outer periphery of the short tube 40 is provided with a thread, the outer periphery thread of the short tube 40 is matched with a nut 41 for mounting, the second annular plate 42 is rotatably mounted on the nut 41, the second annular plate 42 is slidably mounted on the outer periphery of the short tube 40, one side of the support rod 30 is hinged to one end of a connecting rod 43, the other end of the connecting rod 43 is hinged to the second annular plate 42, and the support rod 30 is respectively rotatably connected to the outer periphery of the short tube 40 through a hinge axis. By rotating the nut 41, the nut 41 drives the second annular plate 42 to move along the short tube 40, and the second annular plate 42 drives the support rod 30 to rotate along the hinge axis through the connecting rod 43. When it is needed, the support rod 30 is kept in a horizontal state to provide support for the sensor probe 1. When it is not needed, the support rod 30 is folded up to save space and is easy to carry.

[0021] Further, as shown in the figure, a handle 50 is fixedly installed on the outer periphery of the nut 41 in this embodiment. Rotating the nut 41 through the handle 50 is more convenient and labor-saving.

[0022] Further, as shown in the figure, the outer periphery of the short tube 40 in this embodiment is fixedly installed with a third annular plate 61, the inner periphery of the first annular plate 6 is provided with threads, the outer periphery diameter of the third annular plate 61 is the same as the inner periphery diameter of the first annular plate 6, and the outer periphery of the short tube 40 is fixedly installed with a cross bar 60. When the sensor probe 1 is not in use, the support rod 30 is folded up, the short tube 40 is placed in the vertical tube 4, and the third annular plate 61 is screwed through the cross bar 60, so that the third annular plate 61 is meshed with the inner periphery threads of the first annular plate 6, so that the sensor probe 1 is completely located in the vertical tube 4, the sensor probe 1 is stored, and it is convenient to carry.

[0023] Furthermore, as shown in the figure, the bottom end of the hammer handle 3 of this embodiment is provided with a thread, and the slide groove 5 is also provided with a thread. After the sensor probe 1 is stored in the vertical tube 4, the hammer handle 3 is pulled upward until the thread of the hammer handle 3 contacts the thread in the slide groove 5, and the hammer handle 3 is rotated at this time, so that the thread of the hammer handle 3 is meshed with the thread of the slide groove 5, and the hammer handle 3 and the hammer head 2 can be limited at this time to prevent the hammer head 2 from hitting the sensor probe 1 during the movement and causing damage to it.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A pile foundation low strain detection device, comprising a sensor probe (1), a sensor body (9), and a hammer head (2), wherein the sensor probe (1) is connected to the sensor body (9) via a circuit, and a hammer handle (3) is fixedly mounted on one side of the hammer head (2), characterized in that: A vertical tube (4) with an opening at the bottom is arranged on the outer periphery of the hammer head (2), a first annular plate (6) is fixedly installed at the bottom of the vertical tube (4), the hammer head (2) can pass through the first annular plate (6) to contact the pile foundation, a slide groove (5) is arranged at the top of the vertical tube (4), the hammer handle (3) is slidably installed in the slide groove (5), a horizontal plate (7) is fixedly installed at the top of the hammer handle (3), and a scale (8) is arranged on the hammer handle (3).

2. A pile foundation low strain detection device according to claim 1, characterized in that: A hard rubber layer (20) is fixedly provided on the bottom of the hammer head (2).

3. A pile foundation low strain detection device according to claim 1, characterized in that: A plurality of support rods (30) are provided at the bottom of the sensor probe (1), and the support rods (30) can fit snugly with the pile foundation.

4. A pile foundation low strain detection device according to claim 1, characterized in that: A short tube (40) is fixedly mounted on the periphery of the sensor probe (1), the short tube (40) is open on both upper and lower sides, the outer periphery of the short tube (40) is provided with threads, the outer periphery threads of the short tube (40) are matched with a nut (41) for mounting, a second annular plate (42) is rotatably mounted on the nut (41), the second annular plate (42) is slidably mounted on the outer periphery of the short tube (40), one side of the support rod (30) is hinged to one end of a connecting rod (43), the other end of the connecting rod (43) is hinged to the second annular plate (42), and the support rod (30) is rotatably connected to the outer periphery of the short tube (40) via a hinge shaft.

5. A pile foundation low strain detection device according to claim 4, characterized in that: A handle (50) is fixedly mounted on the outer periphery of the nut (41).

6. A pile foundation low strain detection device according to claim 4, characterized in that: A third annular plate (61) is fixedly mounted on the outer periphery of the short tube (40), a thread is provided on the inner periphery of the first annular plate (6), the outer periphery diameter of the third annular plate (61) is the same as the inner periphery diameter of the first annular plate (6), and a cross bar (60) is fixedly mounted on the outer periphery of the short tube (40).

7. A pile foundation low strain detection device according to claim 6, characterized in that: The bottom end of the hammer handle (3) is provided with a thread, and the slide groove (5) is also provided with a thread.

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